[Bug c++/54984] [4.6/4.7/4.8 Regression] Array allocated with new in a template class is default initialised

[paolo.carlini at oracle dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54984



--- Comment #5 from Paolo Carlini <paolo.carlini at oracle dot com> 2012-10-26 
00:17:45 UTC ---

And I'm testing the below, which appears almost obviously correct: essentially,

when build_new is passed a pointer to null pointer to VEC, it should not turn

the null pointer to VEC into an empty VEC!



Index: init.c

===================================================================

--- init.c      (revision 192814)

+++ init.c      (working copy)

@@ -2911,7 +2911,8 @@ build_new (VEC(tree,gc) **placement, tree type, tr



       orig_placement = make_tree_vector_copy (*placement);

       orig_nelts = nelts;

-      orig_init = make_tree_vector_copy (*init);

+      if (*init)

+       orig_init = make_tree_vector_copy (*init);



       make_args_non_dependent (*placement);

       if (nelts)